Typically caused by falls from a height, motor vehicle accidents and severe twisting injuries such as can occur in basketball players who land on a plantar-flexed and inverted foot

Usually result from severe trauma

Most commonly, there is medial displacement of the distal fragments (80%)

The foot is displaced inward and upward

But displacement in other directions can occur

Eversion injuries result in lateral dislocations

There are frequently associated fractures of the calcaneus, cuboid and navicular

A small percentage are open

The talus remains in the ankle mortise

Chopart's fracture dislocation. Black arrow points to talus which is dislocated from navicular (yellow
arrow) at talonavicular joint. Calcaneus (blue arrow) is dislocated from the cuboid (red arrow), which is also fractured. The dislocation is at the calcaneocuboid joint.
This is an uncommon dislocation.
The forefoot is usually displaced medially rather than laterally as in this case.